 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.wizards.datatransfer;

 import java.util.List ;

 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.wizard.Wizard;
 import org.eclipse.ui.IEditorPart;
 import org.eclipse.ui.IExportWizard;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchPage;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.ide.IDE;
 import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
 import org.eclipse.ui.internal.wizards.datatransfer.DataTransferMessages;
 import org.eclipse.ui.internal.wizards.datatransfer.WizardFileSystemResourceExportPage1;
 import org.eclipse.ui.plugin.AbstractUIPlugin;

 /**
  * Standard workbench wizard for exporting resources from the workspace
  * to the local file system.
  * <p>
  * This class may be instantiated and used without further configuration;
  * this class is not intended to be subclassed.
  * </p>
  * <p>
  * Example:
  * <pre>
  * IWizard wizard = new FileSystemExportWizard();
  * wizard.init(workbench, selection);
  * WizardDialog dialog = new WizardDialog(shell, wizard);
  * dialog.open();
  * </pre>
  * During the call to <code>open</code>, the wizard dialog is presented to the
  * user. When the user hits Finish, the user-selected workspace resources
  * are exported to the user-specified location in the local file system,
  * the dialog closes, and the call to <code>open</code> returns.
  * </p>
  */
 public class FileSystemExportWizard extends Wizard implements IExportWizard {
     private IStructuredSelection selection;

     private WizardFileSystemResourceExportPage1 mainPage;

     /**
      * Creates a wizard for exporting workspace resources to the local file system.
      */
     public FileSystemExportWizard() {
         AbstractUIPlugin plugin = (AbstractUIPlugin) Platform
                 .getPlugin(PlatformUI.PLUGIN_ID);
         IDialogSettings workbenchSettings = plugin.getDialogSettings();
         IDialogSettings section = workbenchSettings
                 .getSection("FileSystemExportWizard");//$NON-NLS-1$
 if (section == null) {
             section = workbenchSettings.addNewSection("FileSystemExportWizard");//$NON-NLS-1$
 }
         setDialogSettings(section);
     }

     /* (non-Javadoc)
      * Method declared on IWizard.
      */
     public void addPages() {
         super.addPages();
         mainPage = new WizardFileSystemResourceExportPage1(selection);
         addPage(mainPage);
     }


     /* (non-Javadoc)
      * Method declared on IWorkbenchWizard.
      */
     public void init(IWorkbench workbench, IStructuredSelection currentSelection) {
         this.selection = currentSelection;
         List selectedResources = IDE.computeSelectedResources(currentSelection);
         if (!selectedResources.isEmpty()) {
             this.selection = new StructuredSelection(selectedResources);
         }

         // look it up if current selection (after resource adapting) is empty
 if (selection.isEmpty() && workbench.getActiveWorkbenchWindow() != null) {
             IWorkbenchPage page = workbench.getActiveWorkbenchWindow()
                     .getActivePage();
             if (page != null) {
                 IEditorPart currentEditor = page.getActiveEditor();
                 if (currentEditor != null) {
                     Object selectedResource = currentEditor.getEditorInput()
                             .getAdapter(IResource.class);
                     if (selectedResource != null) {
                         selection = new StructuredSelection(selectedResource);
                     }
                 }
             }
         }

         setWindowTitle(DataTransferMessages.DataTransfer_export);
         setDefaultPageImageDescriptor(IDEWorkbenchPlugin.getIDEImageDescriptor("wizban/exportdir_wiz.png"));//$NON-NLS-1$
 setNeedsProgressMonitor(true);
     }

     /* (non-Javadoc)
      * Method declared on IWizard.
      */
     public boolean performFinish() {
         return mainPage.finish();
     }
 }

